Vehicle sleep timer



FIG. 1 is a perspective view of a vehicle sleep timer that embodies my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a left side elevational view thereof, the right side elevational view being a mirror image of the left side elevational view. 

The ornamental design for a vehicle sleep timer, as shown and described. 